public static GDIContext CreateForDisplay(string displayName)
{
IntPtr hdc = IntPtr.Zero;
hdc = GDI32.CreateDC("DISPLAY", displayName, null, IntPtr.Zero);
GDIContext newContext = new GDIContext(hdc, true);
return newContext;
}
public static GDIContext CreateForDevice(string device, string name)
{
IntPtr hdc = IntPtr.Zero;
hdc = GDI32.CreateDC(device, name, null, IntPtr.Zero);
GDIContext newContext = new GDIContext(hdc, true);
return newContext;
}
public Projector()
: base("Snap N Projector", 20, 20, 640, 480)
{
HostForm groupForm = new HostForm();
groupForm.ShowDialog();
// Get the address and port from the form
string groupIP = groupForm.groupAddressField.Text;
int groupPort = int.Parse(groupForm.groupPortField.Text);
IPEndPoint ipep = new IPEndPoint(IPAddress.Parse(groupIP), groupPort);
fDrawingContext = GDIContext.CreateForDesktopBackground();
fDestinationRect = new Rectangle(0, 0, fDrawingContext.SizeInPixels.Width, fDrawingContext.SizeInPixels.Height);
// Create the session
fSession = new MultiSession(Guid.NewGuid().ToString(), ipep);
fViewer = new SketchViewer(fSession, 1600, 1200);
fViewer.DataChangedEvent += ReceiveImage;
}
internal GDIContext(GDIContext aDC)
: this(GDI32.CreateCompatibleDC(aDC), true)
{
}
public static GDIContext CreateForWindowClientArea(IntPtr hWnd)
{
IntPtr hdc = IntPtr.Zero;
hdc = User32.GetDC(hWnd);
//hdc = User32.GetDCEx(hWnd, IntPtr.Zero, DeviceContextValues.Window);
GDIContext newContext = new GDIContext(hdc, false);
return newContext;
}
public static GDIContext CreateForWholeWindow(IntPtr hWnd)
{
IntPtr hdc = IntPtr.Zero;
hdc = User32.GetWindowDC(hWnd);
GDIContext newContext = new GDIContext(hdc, false);
return newContext;
}
public GDIRenderer(GDIContext devContext)
{
fObjectDictionary = new Dictionary<Guid, GDIObject>();
fDeviceContext = devContext;
fDeviceContext.SetGraphicsMode(GDI32.GM_ADVANCED); // Use advanced graphics mode so we can use world transforms
}
public ScreenSnapper(GDIContext aContext)
{
fContext = aContext;
}
/// <summary>
/// Create a GDIContext so that drawing to the desktop can occur.
/// On Vista, the drawing will be behind all windows, but will draw on top
/// of any icons on the actual desktop.
/// For Windows XP, the drawing will be behind those icons as well.
/// </summary>
/// <returns>The Device Context for drawing to the desktop background.</returns>
public static GDIContext CreateForDesktopBackground()
{
IntPtr hDC = IntPtr.Zero;
// First get a handle on the Program Manager window using FindWindow
IntPtr hProgMan = User32.FindWindow("ProgMan", null);
if (IntPtr.Zero != hProgMan)
{
// The only child of this window is the Shell Window
// So get that handle.
IntPtr hShellView = User32.GetWindow(hProgMan, User32.GW_CHILD);
// Now that we have the shell window, get the ListView, which is the
// child displaying everything.
IntPtr hListView = User32.GetWindow(hShellView, User32.GW_CHILD);
// Finally, get the DeviceContext handle for this list view
hDC = User32.GetDC(hListView);
}
else
{
// If null was returned, then we're probably on Vista, and need to ask for
// The "Program Manager" window.
if (IntPtr.Zero == hProgMan)
{
hProgMan = User32.FindWindow("Program Manager", null);
hDC = User32.GetDC(hProgMan);
}
}
// And create a GDIContext for it
GDIContext aContext = new GDIContext(hDC, false);
return aContext;
}
public virtual bool StretchBlt(GDIContext srcDC, Rectangle srcRect, Rectangle dstRect, TernaryRasterOps dwRop)
{
bool result = GDI32.StretchBlt(this, dstRect.Left, dstRect.Top, dstRect.Width, dstRect.Height,
srcDC, srcRect.Left, srcRect.Top, srcRect.Width, srcRect.Height, (int)dwRop);
return result;
}
public virtual bool PlgBlt(GDIContext srcDC, Rectangle srcRect,
POINT[] dstParallelogramPoints,
IntPtr hbmMask, int xMask, int yMask)
{
bool result = GDI32.PlgBlt(this, dstParallelogramPoints,
srcDC, srcRect.X, srcRect.Y, srcRect.Width, srcRect.Height,
hbmMask, xMask, yMask);
return result;
}
public virtual bool BitBlt(GDIContext srcDC, Point srcPoint, Rectangle dstRect, TernaryRasterOps dwRop)
{
bool success = GDI32.BitBlt(this, dstRect.X, dstRect.Y, dstRect.Width, dstRect.Height,
srcDC, srcPoint.X, srcPoint.Y, (int)dwRop);
return success;
}
public virtual bool AlphaBlend(GDIContext srcDC, Rectangle srcRect, Rectangle dstRect, byte opacity)
{
blender.SourceConstantAlpha = opacity;
bool success = GDI32.AlphaBlend(this, dstRect.Left, dstRect.Top, dstRect.Width, dstRect.Height,
srcDC, srcRect.X, srcRect.Y, srcRect.Width, srcRect.Height, blender);
return success;
}
public virtual void StretchBlt(int x, int y, int width, int height,
GDIContext srcDC, int srcX, int srcY, int srcWidth, int srcHeight,
TernaryRasterOps dwRop)
{
bool success = DeviceContext.StretchBlt(srcDC, new Rectangle(srcX, srcY, srcWidth, srcHeight),
new Rectangle(x, y, width, height), dwRop);
}
//public virtual void BitBlt(int x, int y, GDIDIBitmap bitmap)
//{
// int scansDrawn = DeviceContext.StretchDIBits(bitmap, new Rectangle(0, 0, bitmap.Width, bitmap.Height),
// new Rectangle(x, y, bitmap.Width, bitmap.Height), TernaryRasterOps.SRCCOPY);
//}
public virtual bool BitBlt(int x, int y, int nWidth, int nHeight,
GDIContext hSrcDC, int xSrc, int ySrc, TernaryRasterOps dwRop)
{
bool success = DeviceContext.BitBlt(hSrcDC, new Point(xSrc, ySrc), new Rectangle(x, y, nWidth, nHeight), dwRop);
return success;
}
public static GDIContext CreateForDefaultDisplay()
{
IntPtr hdc = IntPtr.Zero;
hdc = User32.GetWindowDC(User32.GetDesktopWindow());
GDIContext newContext = new GDIContext(hdc, false);
return newContext;
}
public ScreenSnapper()
{
fContext = GDIContext.CreateForDefaultDisplay();
}
public static GDIContext CreateForAllAttachedMonitors()
{
IntPtr hdc = IntPtr.Zero;
hdc = GDI32.CreateDC("DISPLAY", null, null, IntPtr.Zero);
GDIContext newContext = new GDIContext(hdc, true);
// public static IntPtr CreateDC(string lpszDriver, string lpszDevice, IntPtr lpInitData);
return newContext;
}
public static GDIContext CreateForMemory()
{
IntPtr hdc;
hdc = GDI32.CreateCompatibleDC(GDIContext.CreateForDefaultDisplay());
GDIContext newConText = new GDIContext(hdc, true);
return newConText;
}
// get the combined world to device coordinate space mapping
public bool GetDPtoLP(GDIContext hDC)
{
if (!GDI32.GetWorldTransform(hDC, out fMatrix))
return false;
POINT origin = new POINT();
GDI32.GetWindowOrgEx(hDC, out origin);
Translate(-(float)origin.X, -(float)origin.Y);
SIZE sizew = new SIZE();
SIZE sizev = new SIZE();
GDI32.GetWindowExtEx(hDC, out sizew);
GDI32.GetViewportExtEx(hDC, out sizev);
Scale((float)sizew.Width / sizev.Height, (float)sizew.Height / sizev.Height);
GDI32.GetViewportOrgEx(hDC, out origin);
Translate((float)origin.X, (float)origin.Y);
return true;
}
